CN101258303A - Apparatus for extracting mined products in the caving mining method of underground mining operations - Google Patents

Abstract

In the case of the arrangement according to the invention for extracting extraction products in caving, the extraction product being removed downwards, by way of a removal hopper (10), into a removal section (11) and being transferred, from the latter, to a removal conveyor arranged in a conveying section, wherein the removal section extends transversely between the conveying section (13) and an auxiliary section (12) moved up parallel to the latter, a loading ramp is arranged in the removal section (11) and forms a ramp surface which is oriented essentially transversely to the conveying direction of the removal conveyor and is inclined in the direction of this removal conveyor. In order for it to be possible to regulate the quantity of extraction material removed by way of the removal hopper and to clear out the removal section quickly and particularly straightforwardly when it has become clogged with extraction material, the invention makes provision for the removal section to be provided with a rail guide which is fixed on the floor or footwall, which extends in the region between the auxiliary section and the conveying section, up to which the loading ramp leads and along which this can be displaced, by means of a displacement drive, in the direction of the conveying section and in the opposite direction.

Description

Apparatus for extracting mined products in the caving mining method of underground mining operations

technical field

The present invention relates to a device for extracting mined products in the caving mining method of underground mining operations, wherein the mined products, after their caving, can pass in a mining face through at least one layer arranged in the floor of the mining face, discharge to a discharge hopper or the like open towards a discharge tunnel erected below the mining face, wherein the discharge tunnel runs parallel to a conveyor tunnel with a discharge conveyor for excavated material Extending transversely between the auxiliary lanes extending from the conveying lanes and accommodating a loading table having a slanting towards the unloading conveyor which is oriented substantially transversely to the conveying direction of the unloading conveyor mesa.

Background technique

One such device is known from WO 2005/001245A2. This known device has proven to be well suited for the extraction of mined products mined in caving mining, but problems sometimes arise if the particle size of the mined and mined material which reaches the charging table via the discharge funnel varies, Because this can suddenly result in fine-grained recovered material, in material that slips through the discharge funnel too quickly until the discharge tunnel is blocked at the height of the roof of the discharge tunnel, and between the loading table and the discharge Unexpectedly large rock blocks become lodged between the lower edges of the funnel and can thus impede or completely interrupt the subsequent flow of material. In this known device it is necessary in such a case to keep the discharge tunnel or the discharge hopper unblocked "by hand", that is to say by the manual work of the miners, which not only means heavy work, but is also time-consuming and dangerous.

Contents of the invention

The object of the present invention is to improve this known device in such a way that in the event of a blockage due to recovered material, the unblocking of the discharge tunnel can be quickly, reliably and safely re-opened and provided for controlling the amount of recovered product arriving through the discharge funnel. possibility.

This object is achieved by the invention in that the unloading tunnel is provided with a guide rail fixedly arranged on the floor, which extends in the area between the auxiliary tunnel and the conveying tunnel and on which guides the loading table and which runs along the The guide rail can be moved in the direction of the conveying tunnel and in the opposite direction by means of a mobile drive.

This embodiment makes it possible to move the entire loading table in the discharge tunnel in the direction of the conveying tunnel and in the opposite direction. The movement of the loading table in the direction of the conveying tunnel or the conveyor arranged therein firstly pushes the recycled material which is located in the discharge tunnel in front of the loading tunnel and which may block it, outwards from the discharge tunnel to the conveyor, At the same time, the loading table always further closes the discharge opening of the discharge funnel during its advancing movement in the discharge tunnel, so that a continuous flow of always less material is possible and the discharge funnel can eventually even be completely closed. On the contrary, during the return of the loading table along the guide rail, the discharge opening of the discharge funnel is gradually opened, so that the gap between the table top of the loading table and the lower opening of the discharge funnel is released again and thus hinders the The material continues to flow over the rocks and can then be sent in the direction of the conveyor. The invention thus enables the control of the discharge of mined material and the opening of the discharge tunnel in a particularly smart manner, since the loading table itself is movable as a kind of movement regulator below the discharge funnel.

Preferably, the travel drive comprises a hydraulic drive cylinder arrangement mounted on the loading table on the one hand and on guide rails on the other hand. Utilizing such a hydraulic propulsion cylinder device can very sensitively and can be said to push the charging table with a large force and make it in the required position, and at the same time, it can drive the recycled materials above or in front of the charging table without difficulty. And push to the conveyor of the conveying roadway.

In a particularly advantageous manner, the guide rail has a plurality of connection points for the push cylinder device, at which connection point the push cylinder device can be selectively connected. This makes it possible to move the charging table over a large total distance even with a small stroke of the push cylinder device, because the push cylinder device is moved from the exact position when the maximum (or minimum) stroke is reached. The connection position on the guide rail is disengaged, then the cylinder is moved in or out and the push cylinder device is connected to another connection position on the guide rail, and then the charging table can be further moved to the previously selected direction from it. move. In this respect it has proved to be particularly advantageous if the connection points are formed in the form of a positioning structure along which the pusher cylinder device can be moved in position and can be locked in different positions after disengagement of a locking device assigned to it. Location. The locking device is expediently provided in such a way that it can be moved unhindered along the guide rail and its positioning structure in one of the two directions of movement of the cylinder of the push cylinder device, but is blocked in the opposite direction. This then constitutes a stop position for the thrust cylinder arrangement, so that it can continue to move the loading table with respect to the provided travel distance. Of course, the direction of action of the positioning structure or the interlocking device cooperating with it is reversible.

Possibly, the thrust cylinder arrangement is provided with a device for extending the stroke distance. The device can essentially comprise a plurality of spacer pieces which are arranged pivotably in and out between the locking device and the respective drive cylinders of the drive cylinder arrangement. With such an extension, it is possible to move the charging table from the auxiliary aisle to the conveying aisle without difficulty.

Furthermore, it is advantageous if the discharge tunnel is provided in the region facing the auxiliary tunnel before the discharge funnel with a protective frame which surrounds the loading platform laterally and above, which in a particularly preferred embodiment of the invention essentially Made of concrete. The protective frame reinforces the frequently fractured area of the roof next to the edge of the discharge funnel pointing towards the side of the auxiliary roadway, so that the edge cannot fall off in this area, which could otherwise lead to the fact that the recovered rock is not conveyed in the direction of the conveying roadway , and sent to the direction of the auxiliary roadway. Furthermore, the protective frame forms a guide frame for the loading table, since it surrounds the loading table narrowly and guidingly on the sides and above. It is also expedient in this respect if the loading table is provided with a lateral protective shell, while the protective frame forms a passage opening whose dimensions are adapted to the width and height of the protective shell of the charging table. In this case, the loading table moves through the passage opening, similar to the movement of a piston in a cylinder.

Advantageously, the guide rail has two parallel flat rails arranged side by side, and a plurality of positioning teeth constituting the positioning structure are arranged on the inner sides facing each other of the two single rails. The symmetrical arrangement achieves a uniform force distribution and loading of the components involved in the movement process, and the arrangement of the positioning teeth on the inside of the guide rails protects the guide rails to the greatest extent against damage.

The monorails can be supported on concreted ties, in particular steel ties, on the base plate, so that the guide rails are formed in the manner of a fixed track and not only ensure particularly precise guidance of the loading table, but also reliably withstand it. The propulsion force to be applied.

In a manner known per se, the loading table can have a discharge cylinder arrangement conveying in the direction of the discharge conveyor, which comprises one or more discharge cylinders. The discharge cylinder arrangement can have a sliding apron, which is preferably displaceable by means of the discharge cylinder in the direction of the conveying tunnel.

On its upper side, the charging table preferably forms a closing surface with which the charging table can close the discharge funnel at least almost below the discharge funnel.

Description of drawings

Additional features and advantages of the invention emerge from the following description and the drawing, in which a preferred embodiment is explained in more detail with the aid of an example. in:

Fig. 1 is a sectional view through the discharge roadway of the apparatus of the present invention for mining copper ore in an underground caving mining operation;

Fig. 2 comprises the oblique upper perspective view of the loading platform that guides on it by the guide rail of the device of Fig. 1; And

3 is a perspective view obliquely from the rear of the loading table of the device according to FIG. 1 .

Detailed ways

Copper ore is mined in the caving mining method with the device according to the invention, which caving in a (not shown) mining face arranged above the discharge hopper 10 and then discharges through the discharge hopper 10 into a below Unloading roadway 11. The discharge tunnel 11 extends transversely both to an auxiliary tunnel 12 and to a delivery tunnel 13 in which a chain-type scraper conveyor 14 is arranged for the removal of recovered products. The transversely extending discharge tunnel 11 is accessible to this from the side of the auxiliary tunnel 12 . The floor of the conveyor tunnel 13 and the chain scraper conveyor arranged thereon are at a lower level than the floor 15 of the discharge tunnel, so that the discharge tunnel 11 leads to the conveyor tunnel above the conveyor and the recovered product can be extracted from The top falls onto the conveyor.

In order to feed the recovered product discharged from the discharge hopper and sent to the discharge roadway to the conveyor in the conveying roadway, a loading table 16 is provided in the discharge roadway, which includes a substantially transverse chain scraper conveyor The conveying direction of machine 14 is oriented to the table 17 inclined towards the chain scraper conveyor, which deflects the rock falling through the funnel 10 into the discharge roadway and guides it to the conveyor. The charging table 16 has, in its rearward part directed towards the side of the auxiliary tunnel 12 , a substantially planar top surface 18 , which adjoins the upper end of the inclined table surface 17 .

The entire loading table 16 is arranged displaceably in the discharge tunnel transversely to the conveying direction of the scraper conveyor. For this purpose, the discharge tunnel is provided with a fixed guide rail 19 on the floor 15 , which extends in the region between the auxiliary tunnel 12 and the conveying tunnel 13 and guides the charging table 16 thereon. For the movement of the loading table in the direction of the conveying tunnel or in the opposite direction, a displacement drive 20 is provided, which comprises a thrust cylinder arrangement supported on the one hand on the loading table and on the other hand on the guide rail 19 . As best seen in FIG. 2 , the guide rail has two parallel side-by-side monorails 21 , 22 which are welded to a plurality of sleeper elements 23 made of steel. Each sleeper element 23 is fixed on the bottom plate 15 of the discharge roadway 11 with concrete again.

The monorails 21, 22 are provided on their oppositely facing inner sides 21a, 22a with a large number of connection points in the form of positioning teeth 24 arranged successively in the longitudinal direction of the guide rail, for which the propulsion cylinder device 20 can utilize the interlocking device 25 assigned thereto Connect at these connection locations. The connecting points 24 form a positioning structure along which the locking device 25 of the advancing cylinder device 20 can be displaceable in a positionable manner and can thus be locked in different positions on the respective rails of the guide rail. The push cylinder 26 of the mobile drive 20 is fixed on the one hand on the loading table and on the other hand in the interlock 25 and in the locked position of the interlock moves in and out to make the loading table 16 unloaded. Advance and return along the guide rail 19 in the material roadway. In the unlocked state of the interlock, the loading table retains its position in the unloading tunnel when the push cylinder 26 moves in and out, so that the interlock of the mobile drive can then be in another interlock on the guide rail. lock position and can be locked in this position. In this way it is possible to move the charging table 16 over a long distance in the unloading tunnel, although the push cylinder has a limited travel distance and thus to send the charging table 16 in an extreme case. to approach the auxiliary roadway 12, thereby completely opening the discharge funnel 10 leading to the discharge roadway, and in the other extreme case, the loading platform is moved in the direction of the conveying roadway 13 so that its top surface 18 completely covers the discharge roadway below. The hopper and therefore the discharge are closed to the greatest extent possible.

It can be seen from FIG. 1 that the unloading tunnel is provided with a protective frame 27 surrounding the loading platform on the sides and above in front of the unloading funnel 10 in the region pointing towards the auxiliary tunnel, which is made of concrete in the illustrated embodiment, However, it can also be a steel structure. The charging platform is provided with a side protective shell 28 and the protective frame 27 on the outer surface next to the top surface 18 from the side and a passage opening 29, whose size is adapted to the width and height of the charging platform, and they are composed of the protective shell and the top Confirmed. The loading table can be guided by the protective frame in comparison with a piston in a cylinder and the structure taken makes it possible for the rock not sent to the discharge tunnel by the funnel 10 to enter the auxiliary tunnel 12, because the passage opening in the protective frame is controlled by the charging Table 16 is practically completely filled and is therefore closed as if by a plug.

It can be seen from FIG. 2 that the thrust cylinder device 20 is provided with a device 30 for extending the stroke distance of the thrust cylinder 26 . The device 30 for extending the stroke distance basically comprises a plurality of spacer blocks 31 assigned to the respective propulsion cylinders, which are pivotably arranged on the locking device 25 and can be swiveled in and out between the interlocking device and the respective propulsion cylinders. out, whereby the connection points of the propulsion cylinders on the interlock can be moved farther.

As can also be seen in this figure, the loading table is provided on its front side pointing towards the conveying tunnel with a discharge cylinder arrangement 32 comprising a plurality of discharge cylinders 33, which actuate the sliding guards 34 and make them move towards the conveying tunnel. The direction of the tunnel is shifted in order to feed to the conveyor rocks which accumulate on the floor 15 of the discharge tunnel 11 and which do not automatically fall onto the conveyor.

It can be seen that by means of the device according to the invention it is possible to move the entire charging table over a large distance in the discharge tunnel and therefore firstly pass the top surface 18 of the charging table partly or completely at the outlet of the funnel Instead, change the size of the outlet of the funnel or even close it completely. Furthermore, the movement of the entire loading table makes it possible in a relatively simple manner to clear the discharge tunnel 11 of recycled material that has accumulated before the discharge tunnel opens into the inlet of the conveying tunnel and thus prevents the continuous flow of other materials through the discharge funnel. The charging table is easily accessible from the side of the auxiliary aisle from its rear, as is its movability along the guide rails ensured by the push cylinders and the guide rails.

Claims (16)

1. Apparatus for extracting mined products in the caving mining method of underground mining operations, wherein the mined products, after their caving, are accessible in the mining face via at least one layer provided in the floor of the mining face, directed to the mining face discharge from a discharge hopper or the like open on the side of a discharge tunnel erected below the surface, wherein the discharge tunnel is between a conveyor tunnel with a discharge conveyor for the recovered material used for mining and a conveyor tunnel extending parallel to the conveyor tunnel between the auxiliary lanes extends transversely to the conveying lane and the auxiliary lane and accommodates a loading table having a slanted towards the discharge conveyor which is oriented substantially transversely to the conveying direction of the discharge conveyor Table top; it is characterized in that the unloading roadway (11) is provided with a guide rail (19) fixedly arranged on the base plate (15), and the guide rail extends in the area between the auxiliary roadway (12) and the conveying roadway (13) and The charging table (16) is guided on the guide rail and can be moved in the direction of the conveying lane (13) and in the opposite direction along the guide rail by means of a mobile drive device (20). 2. The device according to claim 1, characterized in that the displacement drive (20) comprises a drive cylinder arrangement which is supported on the loading table (16) on the one hand and on the guide rail (19) on the other hand. 3. The device according to claim 1 or 2, characterized in that the guide rail (19) has a plurality of connection positions (24) for the push cylinder device (20), in which the push cylinder device can be selectively connected superior. 4. according to the described device of claim 3, it is characterized in that, constitute each connection position by the mode of a positioning structure, push cylinder device can be positioned along this positioning structure after throwing off an interlocking device (25) that is configured for it freely moveable and lockable in different positions. 5. Device according to one of claims 3 to 4, characterized in that the drive cylinder device (20) is provided with a device (30) for extending the stroke distance. 6. The device according to claim 5, characterized in that the device (30) for extending the stroke distance basically comprises a plurality of spacer blocks (31), which are arranged in a joint in a swingable or swingable manner. Between the lock device (25) and the push cylinder (26) of the push cylinder device (20). 7. According to the described device of one of claims 1 to 6, it is characterized in that the discharge tunnel (11) is provided with a side and Surround the protective frame (27) of charging platform (16) above. 8. The device as claimed in claim 7, characterized in that the protective frame (27) consists essentially of concrete. 9. Device according to one of claims 1 to 8, characterized in that the loading table is provided with lateral protective housings (28). 10. according to the described device of claim 9, it is characterized in that, protective frame (27) forms a channel opening (29), and the size of this channel opening is adapted to the width and the protective casing (28) of charging table (16) high. 11. According to the described device of one of claims 1 to 10, it is characterized in that the guide rail (19) has two parallel monorails (21, 22) arranged side by side, and on the inner sides (21a) facing each other of the two monorails , 22a) are provided with a plurality of positioning teeth (24) constituting a positioning structure. 12. The arrangement as claimed in claim 11, characterized in that the monorails (21, 22) are supported on sleepers, in particular steel sleepers (23), which are concreted on the floor. 13. The device according to one of claims 1 to 7, characterized in that the loading table (16) has a discharge cylinder device (32) conveyed in the direction of the discharge conveyor (14), the discharge cylinder device Contains one or more discharge cylinders (33). 14. The device as claimed in claim 13, characterized in that the discharge cylinder device (32) has a sliding guard (34). 15. The device according to claim 14, characterized in that the sliding guard (34) is displaceable in the direction of the conveying tunnel (13) by means of the discharge cylinder (33). 16. The device according to one of claims 1 to 15, characterized in that the loading table (16) forms a closed surface (18) on its upper side, with which the charging table is at least almost The discharge funnel can be closed below the discharge funnel (10).

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